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Unread 06-03-2007, 09:38 PM   #1
98zjteen
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5.9 advice

It is a long story, but i met a couple with a 5.9 in a parking lot and asked them if it was for sale. They said it wasn't on the market, but it will be soon. I called back three days ago and test drove it. I drove it like I stole it and was impressed. It shifted smooth and ran great. It has almost 170,000 miles. I offered $4000 and they took it. Did I get a good deal? And when I get it (after selling my inline 6 ) what should I do first (performance wise) cold air? cat? By the way, it will be used off road.

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Unread 06-04-2007, 07:21 AM   #2
EMTimZJ
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Don't get a cold air intake, that is lame. If you want to go new exhaust, the Kolak cat-back is by far the best. Kolak ignition up-grade and mopar perf. ecu are fine.

kolak@aol.com or kolak@kolakperformance.com is who you want to get a hold of. Nick (kolak) can get you what you want, either lift components or performance items for the 5.9L. He has his own 5.9L and knows what he is talking about. Prices and service are great.

HTH
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Unread 06-04-2007, 08:01 AM   #3
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If it is in good shape you got a deal!
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Unread 06-04-2007, 08:23 AM   #4
HighLonesome
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Add Edelbrock headers to what's done in this writeup. Will be a perfect fit.

http://www.jeepsunlimited.com/forums...d.php?t=804146

and you'll see splendid power gains across the board. The 2.5" exhaust will maintain great lowend torque for your offroading pleasure.

Add the Mopar performance PCM if you can find one.

Then go with the Harland Sharp 1.7 rockers. After that, its get expensive.
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Unread 06-04-2007, 08:27 AM   #5
BlaineWasHere
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Quote:
Originally Posted by EMTimZJ
Don't get a cold air intake, that is lame. If you want to go new exhaust, the Kolak cat-back is by far the best. Kolak ignition up-grade and mopar perf. ecu are fine.

kolak@aol.com or kolak@kolakperformance.com is who you want to get a hold of. Nick (kolak) can get you what you want, either lift components or performance items for the 5.9L. He has his own 5.9L and knows what he is talking about. Prices and service are great.

HTH
Don't listen to Tim, pair a K&N FIPK or other intake with nice exuast. That is if you have money to spend on performance. Becucase a FIPK is not really a great bang for your buck when it comes to power. However if you can score one used, which you should be able to if you watch the forsale forums over at www.jeepsunlimited.com for awhile.

New they are like $279 but I paid $125 for a used one.

I have one and I am happy I do, it really improves the sound when paired with my FM40 muffler.
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Unread 06-04-2007, 08:30 AM   #6
HighLonesome
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The FIPK only helps at WOT. You know that right?
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Unread 06-04-2007, 08:35 AM   #7
ArloGuthroJeep
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Quote:
Originally Posted by five.nein
The FIPK only helps at WOT. You know that right?
And with stock gearing and 32's, I drive @ WOT all the time just to maintain speed
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Unread 06-04-2007, 08:45 AM   #8
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Quote:
Originally Posted by ArloGuthroJeep
And with stock gearing and 32's, I drive @ WOT all the time just to maintain speed
4.slow?
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Unread 06-04-2007, 09:15 AM   #9
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I have been upgrading every one of my vehicles and one the first things I do is an intake then exhaust and so forth. I have never (until letely on this forum) heard so much criticism about an intake. I would match my performance gains to any stocker out there and see if there isn't an improvement. Rule of thumb...more air in and more air (less restrictive) out equals more power. Usually means a loss in mpg's but if done right then you get an increase. I say this because now that I have finished off mine with a set of headers I now get over 20 on the hwy and 14-16 in the city to where I used to get 16-17 on the hwy and 11-13 in the city. Remarkable improvements if I may say so.
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Unread 06-04-2007, 09:22 AM   #10
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There are other ways to improve your intake than paying tons of money for a FIPK or other name brand intake. Search the forum for some of the homemade versions.

I'm poor so I drilled holes in my stock airbox to improve flow (idea I got from searching the forum ) and got noticeable gains in MPG as well as acceleration (butt dyno ).
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Unread 06-04-2007, 09:33 AM   #11
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I noticed great gain w/ my Cold Air Intake, especially when I paired it with my free flowing exhaust. Can't say any MPG #'s but I noticed an increase in acceleration and better WOT power (which I use a lot).

Tim- Common now buddy....I may have spent money poorly but that is one engine upgrade I can vouch for. No you won't get 15 more ponnies like they claim but I see and increase in pwr.
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Unread 06-04-2007, 09:51 AM   #12
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Guys, I was referring to a true CAI where the intake is re-routed to the wheel-well or somewhere else (mostly lower) to draw in air. I was NOT referring to the K&N style FIPK that is still in the engine bay.

He said he was going to "wheel" therefore a true CAI = lame. Again I am NOT referring to a K&N style.

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Unread 06-04-2007, 10:03 AM   #13
sand zj
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Quote:
Originally Posted by EMTimZJ
Guys, I was referring to a true CAI where the intake is re-routed to the wheel-well or somewhere else (mostly lower) to draw in air. I was NOT referring to the K&N style FIPK that is still in the engine bay.

He said he was going to "wheel" therefore a true CAI = lame. Again I am NOT referring to a K&N style.

Newbies
Now common old timer, a K&N FIPK is considered cold air intake. Of course you could argue that the stock airbox is a cai seeing as it draws cold air from outside the eng bay. Hmmm, whos the newb?
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Unread 06-04-2007, 10:19 AM   #14
EMTimZJ
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We both know what we meant Sure we all call K&N style intakes CAI's, but they still have their intake under the hood. True CAI's have the intake mounted outside pulling in air. Granted, no one may install the latter, but with the influx of JU type threads around here... who can be sure!

Since the K&N style intake and the stock air box have their intakes in the same position under the hood, don't you think the gains that you saw are coming from the better air flow design and not the "colder" temperatures?
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Unread 06-04-2007, 10:21 AM   #15
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Tim, Tim, Tim... I have no idea and don't care. I just like giving you a hard time
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